Analyst readout for executives and security teams
Plain-English summary
This is a Chrome for Android memory disclosure issue in WebGL. A victim who opens a crafted web page could expose potentially sensitive process memory. The CVE rates it medium with high confidentiality impact, and the sources do not show confirmed active exploitation.
Executive priority
Treat this as a timely mobile browser update issue, not a crisis. Confidentiality impact is high, but exploitation requires user interaction and no active exploitation is cited. Prioritize Android Chrome patch compliance within normal expedited browser update processes.
Technical view
CVE-2026-9917 is a CWE-457 uninitialized-use flaw in WebGL affecting Google Chrome on Android prior to 148.0.7778.216. CVSS 3.1 is 6.5: network attack vector, low complexity, no privileges, user interaction required, high confidentiality impact, no integrity or availability impact.
Likely exposure
Organizations are exposed where Android devices run Chrome versions earlier than 148.0.7778.216, especially unmanaged BYOD or delayed mobile update channels. The bundle does not identify other affected Google products or platforms.
Exploitation context
The CVE says a remote attacker could use a crafted HTML page to obtain potentially sensitive information from process memory. KEV is false, and the supplied sources do not provide evidence of exploitation in the wild.
Researcher notes
The record is specific to WebGL uninitialized memory use and information disclosure. Do not assume code execution, sandbox escape, or non-Android impact from the supplied evidence. The Chrome Releases desktop reference may not fully document Android-specific remediation details.
Mitigation direction
- Update Chrome on Android to 148.0.7778.216 or later.
- Verify managed Android update policies enforce Chrome updates promptly.
- Check Google Chrome release guidance for any additional vendor instructions.
- Prioritize unmanaged or BYOD Android fleets for user update messaging.
Validation and detection
- Inventory Android Chrome versions across MDM and endpoint telemetry.
- Flag devices running Chrome earlier than 148.0.7778.216.
- Confirm update rollout completion after remediation.
- Review browser crash or security telemetry for unusual WebGL-related signals.
Public sources used
Based on public source material and reviewed before publication.
Conservative CVE-to-ATT&CK context
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ATT&CK lookup starting points
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CWE-457: Exact CWE lookup
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Open ATT&CK lookupCVE-2026-9917 mapping review
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Open ATT&CK lookup- Severity
- Medium
- CVSS
- 6.5 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
SSVC decision data
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N 2.8 3.6 CISA-ADP Vulnerability scoring details
Base CVSS 3.1 score
6.5 MediumVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- CVE reserved CVE Program
The CVE ID was reserved by the assigning CNA.
- CVE published CVE Program
The CVE record was published.
- CVE updated CVE Program
The CVE record metadata indicates this as the latest update time.
ADP provider summaries
Source materials
- CVE List V5 source CVE List V5
- https://chromereleases.googleblog.com/2026/05/stable-channel-update-for-desktop_0877304591.html CVE reference, Chrome
- https://issues.chromium.org/issues/500095304 CVE reference, Chrome
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Use of Uninitialized Variable
Use of Uninitialized Variable represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.